<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1, user-scalable=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge,chrome=1">
    <meta name="author" content="赵鹤阳">
    <title></title>
    <style>
        * {
            box-sizing: border-box;
        }

        ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .box {
            width: 520px;
            height: 280px;
            margin: 100px auto;
            position: relative;
        }

        .box-img li {
            position: absolute;
            top: 0;
            left: 0;
            display: none;
        }

        .box-img li.first {
            display: block;
        }

        .indicator {
            width: 100%;
            position: absolute;
            left: 0;
            bottom: 20px;
            display: flex;
            justify-content: center;
            color: #fff;
        }

        .indicator li {
            width: 20px;
            height: 20px;
            background-color: #ddd;
            border-radius: 50%;
            text-align: center;
            line-height: 20px;
            margin: 10px;
            cursor: pointer;
        }

        .indicator li.active {
            background-color: red;
        }

        .img-click span {
            width: 30px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            color: white;
            background-color: rgba(0, 0, 0, 0.1);
            position: absolute;
            top: calc(50% - 20px);
             display: none; 
        }

        .img-click span:hover {
            background-color: orange;
            cursor: pointer;
        }

        .img-click .prev {
            left: 0;
        }

        .img-click .next {
            right: 0;
        }
    </style>
</head>

<body>
    <div class="box">
        <ul class="box-img">
            <li class="first"><a hrer="#"><img src="img/01.jpg" alt=""></a></li>
            <li><a hrer="#"><img src="img/02.jpg" alt=""></a></li>
            <li><a hrer="#"><img src="img/03.jpg" alt=""></a></li>
            <li><a hrer="#"><img src="img/04.jpg" alt=""></a></li>
            <li><a hrer="#"><img src="img/05.jpg" alt=""></a></li>
        </ul>
        <ul class="indicator">
            <li class="active">1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
            <li>5</li>
        </ul>
        <div class="img-click">
            <span class="prev">&lt;</span>
            <span class="next">&gt;</span>
        </div>
    </div>
    <script src="./jquery.js"></script>
</body>

</html>
<script>
    var index = 0;
    function showImg() {
        $('.box-img>li').eq(index).fadeIn(400).siblings().fadeOut(400)
        $('.indicator li').eq(index).addClass('active').siblings().removeClass('active')
    }
    $('.box').hover(function () {
        $('.prev').show()
        $('.next').show()
    }, function () {
        $('.prev').hide()
        $('.next').hide()
    })
    var timer = setInterval(nextImg, 1000)
    $('.indicator>li').mouseover(function () {
        index = $(this).index()
        showImg()
    })
    $('.box').mouseover(function () {
        clearInterval(timer)
    })
    $('.box').mouseout(function () {
        timer = setInterval(nextImg, 1000)
    })

    $('.prev').click(function () {
        prevImg();
    })
    $('.next').click(function () {
        nextImg();
    })
    function prevImg() {
        index = index == 0 ? $('.box-img>li').length - 1 : index - 1;
        showImg();
    }
    function nextImg() {
        index = index == $('.box-img>li').length - 1 ? 0 : index + 1;
        showImg();
    }

</script>